docs(srv): update

Author: SamyOubouaziz

faq/serverless-functions.mdx

@@ -180,7 +180,7 @@ Refer to our dedicated page about [Serverless Functions Runtimes Lifecycle](/ser
 Currently, a new function instance will always start after each deployment, even if there is no traffic and the minimum
 scale is set to 0. This behavior is not configurable at this time.
 
-## Use cases
+## Usage
 
 ### How can I deploy my Functions?